Lease Automatic Custody Transfer unit or skid (LACT) is a unit designed to measure the amount of flow passing through it , using various technologies of measuring elements (coriolis, ultrasonic, orifice plate). Additionally, these units are equipped with pressure and temperature instrumentation for calculating compensated flow. In this way it can be determined the actual amount of substance sent thru the pipeline. This calculation is performed by a flow computer. Third party certification is available.